Tumbler padlock



Jan. 16, 1923. A 1,442,378.

R. L. WILLIAMSON.

TUMBLER PADLOCK..

FILED MIIII.1.I922.' 2 SHEETS-SHEEI I.

l l I 15 II' E l;

I O xl7 :17e/5 l 7 Jan. 16., 1923.

R. L. WILLIAMSON.

TUMBLER PADLocK.

FILED MAR. l, 1922. 2 SHEETSSHEET 2.

TUMBLER PADLOCK.

Application filed March 1, 1922.

[o all fwzom t may concern:

Be it known that l, Renner L.V lil/*intuitisoir, a citizen ,ot the llnited States, esiding at Erwin, inthe county oli Uiiicoi and State ol: Tennessee, have inventedA certain new and useful improvements in Tuinbler Padlocks, ot which the following is si specificetion, reference beingy had to the accompanying` drawings.

rliiis invention relates to locks, und particularly to the locking niechenisin of padlocks.

The gene 'al object ol' this invention is to provide a pdlock wherein the shackle is held tioin reinow'al by a bolt engaging both arins ot the legs ot the shackle, and to provide a barrel whereby the bolt may be shifted out oit its lockingI position, and provide a series ot. tuinbleis so designed that normally they iinpede Voi prevent the move- 1 nient of the barrel but which, upon the insertion of the proper key, will all be shifted to a correctposition to perniit the oscillation ot the barrel and the consequent disengagenient oie the bolt trein the shackle. L

A `tuither object is 'to provide a construction of this kind wherein the barrel is forined with s longitudinally extending stump, the tuinblers each being 'formed with e longitudinally extending slot into which the stuinp is adapted to pass, the tumble-rs being adapted to be shifted with their slots in register to perniit the passage of the stunip when the proper key is inserted within the padlock,

Other. objects will appear in the course of the following description My invention is illustrated in the eccompanying drawings, wherein Figure 1 is u side elevation of e padlock constructed in accordance with iny invention;

Figure .2 through Figure 3 s a vertical sectional view thereis a section ou the line 3-2 ot is a section on the sume line :is showingthe'locking' bolt out position;

a section on the line 5--5 of Figure llfigure 3, but of its locking Figure 5 is igure 2;

Figure 6 is a like view to Figure 5, but

Figure S is a side elevstionoi?` the key;

Serial No. 540,229.

the

figure 9 is a. perspective view oit barrel;

Figure 10 is a locking` bolt;

`lfigure 1 1 is a perspective view of the shackle;

rigure l2 is a perspective view oi' one ot' the tumblers and spring` therefor.

Referring to these drawings, 10 designstesthe casing ot the padlock, which is elliptical in cross section and provided with perspective view ot the `the ends 11 and 12. @ne et these ends is provided with pei-iterations 1.23 :tud 1,41-, to receive the legs ot' theshaclde 15. These legs are unequal in length und the short lee 16 is formed with a notch 17 where-in. this locking bolt engagedtlie other leg; being formed with u notch 18 directly opposite the notch 17 sind on the saine level, and midway between this notch 18 and the end of the leg the leg' is provided. with the inwardly extendinq Aug 19 which, when the shackle is 'fully inserted, is adapted to bear against e stop or shoulder 20 forined in the casing` ot the lock. The casing` is, of course` to be formed in two or incre sections or parts, these sections or perte being; engaged with each other in any suitable manner so as to prevent their unauthorized detachinent.

Rotatably mounted within the casing; the barrel 21. One end ol this barrel is reduced, as at 22, and extends through au opening` in one end oi? the casing nud is nrovided with a slot 3 'tor the key 24, the-key being` illustrated in Figure S. At its opposite end the barrel is formed with a reduced portion Q5 constitutingl s truiinion tor the barrel and supported in eny suitable hearing in the adj scent end wall. Thus the bai-- ielinay be oscillated by the. insertion ot the key. inward ot the trunnion the berrcl is 'termed with an annular shoulder 26 upon which thc central portion ol" the holt 2T rides. rlhis bolt 27' hns u circular open ing 'xlfl at iniddlc into which the shoulder 2e tits1 und this opening" E23 has au arcuate extension 29, into which a. lug il() projcctiiu 'from the shoulder 26 is adapted to engage,

lt will be obvious now that the barrel may be given a certain rotation, tor instance Vapproxiinstely a quarter rotstion, without sft'ectingthe bolt, but that when the lug 30 strikes the ends ot' the arcuate slot 29, the bolt will be oscilla-ted with the barrel andy will shift from a position where its ends are in engagement with the notches i7 and 18, as illustrated in Figure el., so as to permit the Withdrawal. ot .the shackle, and that a reverse movement et the barrel will turn the bolt to the position shown in Figi'- ure 3 where it engages in these notches and prevents the removal ol the shackle. A. spring` 31 bears at one end against the wall et the casing and at its other end is attached to t-he bolt and acts to urge the-bolt into its locking position.

rlhe barrel is segmental in cross section, the transverse faces oft' the barrel being` disposed at an `oliituse angle to each other, as illustrated in Figure 5, and hiirriiiig, an extension of the periphery of the barrel and extending longitudinally the entire length `ofthe barrel is a peripherally curved flange or stump, designated 32. ltivill he seen that the key slot opens upon the diametrical or transverse face of the barrel so that whenthe key is inserted in the barrel,V the toothed edge ot the key will project beyond these transverse fares and toward the edge oli the stump.

Pivoted between the abutments 33 and 3l are a plurality ol" tumblers 3G, one ol which tuinblers is illustrated in Figure 12. These tumblers are adapted to bear upon the diametrical tace of the barrel when the barrel is in the position shown in Figure 5 and are urged against this lace by springs 37. Each of the tuinblers is formed with a slot 38 which extends inward from its `lree edge, this slot being of such shape that it may receive the stump 32 when the tumbler is in proper position and will permit the barrel to rotate for a quarter turn or any other desired angle. l do not Wish to be limited to the particular shape ot this slot. l have illust ated the slot 3S, however, as being curved and having' the saine degree o'l eurvature` as the stump.

All of the t-uniblcrs are slotted, as at 33, and when all oit the tuinblers are disposed with their slots in register with each other, then the stump 32 can pass into all of the slots at the Same time and the barrel can be rotated. blers .is depressed unduly or raised unduly, it will be obvious that that particular tuinhier willv bar the passage ol the stump and will prevent the lock lrom heine released. 'lhe key is so formed that when it is inserted it Will raise the depressed tumhlers, that is 1 tuniblers which are depressed to such a degrec that their slots are not in alignment With the path of movement ol the stump to an extent suliicient to bring the slots olf these depressed tulnblers into line Wit-h the slots of the other tuinblers and permit the entrance oil" the stump. To this end, the key made With raised teeth separated from each other by depressions, and the turnhlers are so formed along their lower edges in an oblf, however, any one ot the tu1n.

vious manner as to be all raised to the same extent when the key is rotated. lNhen the key .is inserted it is in the position shown in Figure 5 and the barrel may oscillate to a slight (Llegree or until the enge of the stump comes against the tui'nblers. Just before the edge of the stump cornes to the tumblers, however, the raised teeth ol the key engage those tuinblers which are depressed and lil't these tuniblers up to bring` them into line with. the stump, and then a lurthfn movenient of the barrel carries the stump into the slot 38 and a quarter turn 'oit' the barrel is etlected, which serves to shift the bolt from its locking position. Uf course, even though the key be now Withdrawn, the turnblers cannot tall back to their original position and it requires that the key shall he reversely turned to reversely turn the barrel and as soon, as the stump has cleared the ends of the tuinblers and the keyv has cleared the ends olf the tun'iblers, the tulnblers will again drop to their inipeding position. Any number ofvtuinhlers nray be used but normally about twelve vtuinblers Will he euthcient to form a very large number ol coin.- binations, and obviously more tumblers than twelve may be used if desired.

` It Will be seenthat With this construction the shackle is held engaged at tivo points, thus making` it very di'llicult to insert an in struinent through the shackle and pry it out from the look casing. t will be seen that the bolt bears against the end ol' the lock casing so that there is' no liability ot the bolt being bent or deformed, and in order to dctach the shackle from the lock casing it would be necessary to break the casing unless, ofcourse, the proper key be used.V No strain comes upon the tumblers and any force exerted .in turning' the key is supported by practically all ot' the tumble-rs so that the tuinblers cannot be broken'.`

liVhile l have illustrated a construction which is particularly effective Ator this purpose, it is obvious that the principle of' the invention might he embodied in other 'forms and l do not Wish to be limitedto the details illustrated, as these might be changed in many 4ways without departing' lroin the spirit ol: the invention as defined in the appended. claims.

l. il padlock ot the character described comprising a casing. a U-shaped shackle insertihlc into the casing and having' a notch in one leef. a barrel axially ..iscillatahle Within the casing- 1` and hay" in' an axial key' slot openine` upon the end ot the casing, a holt mounted concentric to the barrel and adapted to bev oscillated into or out oit engagement with the notch by an oscillation of the barrel, the holt and barrel having limited relative'rnovement around their connnon axis, and a series of tumblers normally in'ipeding the oscillation of the barrelv to an unlocking position but. shiltable out of the unlocking position by the insertion of a key.

2. In a padlock, a lock casing, an axially oscillatable barrel mounted in the lock casing and having a longitudinally extending key slot opening upon one end oi the casing, a bolt mounted upon the barrel and oscillatable therewith, the shackle having a notch with which the bolt is adapted to engage in one position of the barrel, and means for preventing an oscillation of the barrel comprising a plurality of tumblers normally disposed to impede said oscillation and adapted to be shifted out of such impeding position by the insertion oit' the key into the shackle.

3. A padlock of the character described comprising a casing, a U-shaped' shackle insertible into the casing and having a notch in one leg, a barrel axially oscillatable within the casing and having an axial key slot opening upon the end of: the casing, a bolt mounted concentric to the barrel and adapted to be oscillated into or out of engagement with the notch by an oscillation of the barrel, the bolt having an arcuate slot, a barrel having a lug operating within said slot to thereby permit the barrel to have limited movement relative to the bolt, and aV series of tumblers normally impeding the oscillation of the barrel to an unlocking position but shiftable out of the unlocking position by the insertion of a key.

4. A padlock including a casing, a U- shaped shackle insertible into the casing and having notches in its legs, an axially rotatable barrel mounted in the casing, an oscillatable bolt carried upon the barrel and oscillatable therewith, the barrel carrying a longitudinally extending stump, the stump being curved concentric to the axis of rotation of the barrel and the barrel being segmental in form and having a key slot opening upon the diametrical lace of the barrel and through one end of the barrel, a plurality of tumblers normally disposed in a position to impede the stump and the movement ofthe barrel, and key actuated means insertible into the barrel adapted to raise the tumblers to permit a movement of the stump and barrel.

5. A lock including an axially rotatable barrel segmental in cross section and having a longitudil'ially extending key slot opening upon the diametrical face of the barrel and upon one end thereof, the barrel carrying a stump extending longitudinally of the barrel and curved concentrically to the axis thereof, a plurality of tumbers disposed in a position to impede the movement of the stump and of the barrel, key actuated means for shifting the tumblers to a position to permit the movement of the stump and barrel, and a locking bolt operatively connected to be shifted by the barrel.

6. A lock comprising a casing, an axially rotatable barrel mounted therein segmental in cross section and having a longitudinally extending key slot opening at one end of the barrel and upon the diametrical face of the barrel, a stump carried by the barrel extending longitudinally thereof and curved concentric to the axis thereof, a locking bolt operatively connected to be shifted by a rotation of the barrel, a plurality of tumblers disposed in the path of movement of the stump, each of said tumblers having a longitudinally extending slot into which the stump is adapted to pass when the tumblers are shifted to a predetermined position, and a key insertible through the end of the barrel and adapted to shift said tumblers to their unlocking position 7. A padlock comprising a casing, one end of theA casing being formed with a central bearing and the opposite end ol the casing with openings, a U-shaped shackle having a long and a short leg, the long leg being insertible through one of the openings and having a stop limiting the outward movement of the shackle, both of said lugs having facing notches, a barrel oscillatably mounted between the ends of the casing, the barrel having a trunnion extending through said opening in the end of the casing, the barrel being segmental in cross section and having a longitudinally extending key slot opening upon the diametrically opposite face ot the barrel and through the trunnion thereof, the opposite end of the barrel being formed with a circular shoulder having an outwardly projecting lug, a locking member enclosing said shoulder and having an arcuate slot into which the lug projects, said locking member being adapted to engage in the notches oi the shackle, a stump extending longitudinally of the barrel and curved concentrically thereto over the diametrical face of the barrel, a plurality of tumblers pivotally mounted within the casing and having slots for the reception of the stump, springs urging said tumblers into a position where certain ot' the tumbelers are disposed in the path ot movement of the stump, and a key insertible through the Slot in the barrel and formed upon one edge to sliitt the tumblers in such In testimony whereof l hereunto aix my L signature.

ROBERT L. VVILLAMSON, 

